Electrical calculating machine



Oct. 20, 1931; I R. E,-BOU TET 1,327,835

' $LECTRICAL CALCULATING MACHINE Filed m. 26. "-1929 4 Sheets-Sheet :1

- Oct. 20, 1931. R. EJBOUTET 1,327,835

ELECTRICALCALCULATING MACHINE Filed Jan. 26, 1929 4 Sheets-Sheet 2 Hal, 7??

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"RE. BOUTET ELEQTRICAL CALCULATING MACHINE Filed Jan. 26, 1929 Oct. 20. "1931.

Earle i9 Patented Oct.- 20, 1931 UNITED STATES,

RENE EDMOND BOUTET, OF PARIS, FRANCE -ELECTRICAL CALCULATING MACHINE Application filed Januaryflfl, 1929, Serial No..335,277, and in Germany March 27, 19 28.

The present inventionis concerned with a calculating machine characterized by the fact that there is associated therewith an electrical device which takes the place of the Pythagoras tables or equivalent mechanical members (revolving drums and the like) which are fitted to calculating machines for obtaining products after actuation of the multiplicand and multiplier keys.

, The electrical device according to the in '-vention is constituted by a circuit board which ischaracterized by the combination of three sets of separate circuits: one set of circuits for the multi lier including nine groups of main circuits ime group for each digit) each actuated by a corresponding ,key, a second set of circuits for recording the product and comprising 11. groups (n varying according to the capacity of the machine) of nine 2 vertical circuits," each group corresponding to a denominational order of the multiplicand and the nine wires of each of said I vertical groups corresponding to the nine digits, and finally a third set of circuits comprising nine horizontal groups (one for each of the nine figures) for registering the mul-tiplicand,

each of the wires of the horizontal groups which intersect the vertical groups but which normally are not electrically connected thererm to, being connected with one of the circuits of the multiplier, whilst means, such as multiplicand keys, are provided for connecting said wires to the vertical wire which in each vertical group corresponds to the figure formas ing the product of the multiplier digit (to which corresponds the principal multiplier circuit concerned) and the multiplicand digitto which corresponds the horizontal group tofwhich the wire in question pertains.

It should be noted that in tha -preceding explanation the expressions horizontal? and "vertical have been used to designate two separate sets of circuits, but it should be understood that these terms have only been used for the sake of clearness andthat any desired orientation of the circuits may be adopted.

S milarly, the terms multiplication, multiplier and multiplicand have been used from the start. this is only by way of example, for

' the electric device according to the invention porting the actuating electromagnets for the may be used, as moreover will be seen hereinafter, to perform other operations.

For registering the products obtained, to each of the n vertical groups there corresponds'a set of nine electromagnets (one for each of the nine wires of eachof said groups), each of said sets of electromagnets co-operating with the wheel of a totalizer or similar member of any known type, so that, when in a given vertical group, current is fed to one of the wires, the elect-romagnet which is energized shall rotate the corresponding wheel of the totalizer for indicating or registering the product figure to which the vertical wire in question corresponds. f

Accordinng to the invention, means are provided for simultaneously registering the two digits (tens and units) which the product formed by multiplying one figure by another may comprise, -said means consisting in asso- 7o ciating, with each group of principal circuits of themultiplier (save thatcorresponding to the digit 1) a group of auxiliary circuits connected to the wires of the set of horizontal circuitssoas to give the tens product digit,

,whilst the corresponding principal circuit supplies the units product digit. y Other characteristics and peculiarities of the invention willbecome apparent from the following description in conjunction with so the accompanying drawings in .which: f

Fig. 1 illustrates the electric circuit which the electric board according to the invention comprises{ l Fig. 2 is a detail view showing a multiplier 35 kc Fig.2 is a sectional end view of the multiplier key on the line IIII, Fig.2..

' Fig. 3 is a plan view of the slide-rest suptotalizers. v I I Figs.-4 and 5 illustrate an actuating lover of the totalizers in longitudinal elevation and cross-section respectively. I 9

Figs. 6 and 7 illustrate a multiplicand key in part sectional elevation and plan respectively. i

Figs. 8 and 9 illustrate how the electrical connections between the multiplier keys and the circuits of the mtltiplicand are obtained in practice.

i Fig. 10 illustrates a modified form of Construction. p

The electric circuits board illustrated in Fig. 1 may be used under the same conditions for all operations which the customary cal-' culating machines have to perform. However, the case of a multiplying machine will be considered by way of example and the board will be described in this connection.

In the first place, the board comprises multiplier circuits M m M 771 M m M single circuit but a group of circuits. It seems simpler however at the outset ,-of the explanation to represent each group of multiplier circuitsrby a single circuit.

Each of the circuits M m and so on is normally open and it may be closed by means of the corresponding multiplier key T T T and so on. There are obviously nine multiplier keys each of which may advantageously be constituted as illustrated in detail in Fig. 2, that is to say it may include a knob 1 having a stem 2 in which is cut a rack 3 which, when the knob 1 is depressed, rotates a disc 4-the cam 5 of which closes in succession the contacts m of the corresponding auxiliary circuit,then the contact R which ,will be considered again presently and finally the contact M of the main multiplier circuit. ous, the circuit opening again as soon as the cam 5 ceases to ,zict. In Fig.2 P designates the current lead-in wire. I

On releasing the knob 1, the latter will return to its original position under the action of the spring 2 which is compressed when the knob 1 is depressed. In order to prevent the return movement of the knob 1 from causing the disc 4 to rotate, the result of which would be to cause the cam 5 to close the contacts m,

22 and M again, the free-wheel device illusratedin 2 has been provided. In this device, the pinionB engaging with the rack 3 has a serrated portion 3 engaging with a similar serrated memberb carried by the cam 5, while a spring 5 presses the member 5 against the member 3. It will be readily understood that when the stem 2 is depressed, the member 3 will-rotate the member 5 whereas, when the stem 2 rises, the serrations of the member 3 will slide over those of the member 5 so that the latter and, consequently, the cam 5 will not be rotated? Matters Said contacts are instantanewill of course be arranged so that for a pre-.

determined displacement of the knob 1, the

cam 5 will make a complete revolution.

The electric board includes, furthermore, a second set of circuits comprising a vertical groups of nine wires. Said groups have been designated by A, B, C and so on, and the wires in each group by A A A and so on, B B B and so on. The nine wires of each group correspond respectively to the nine digits and they are electrically connected to electromagnets located insets of nine as may be seen in Fig. 3. Each set, compre-- hensively designated by TA,TB,-TC and so on, corresponds to one of the groups of vertical wires A, B, C and in each set,each of the nine electromagnets m1, ta2,'ta3

v and so on, tbl, tb2, tb3 and so on, correcorresponds to four sets of electromagnets but obviously there may be any number of groups depending on the capacity of the apparatus required (normally 12 groups). In Fig. 3,

P designates the return wire of the general supply circuit.

Opposite each set of electromagnets TA,

TB, TC is located an oscillating lever LA, LB, LC illustrated in dotted lines in Fig. 3 and in detail in Fig. 4 (elevational view Each lever caripivot about a fixed axis 6 and it includes nine links lal, 1a2, 1a3 each located opposite one of the electromagnets tal, m2, m3 The links (see Fig. 5) are hook shaed so that each one may pivot the lever L when it is attracted by the corresponding electromagnet, without such movement being hindered by the other links relative'to which the lever may move. Each of the levers LA, LB, LC has on the free end thereof a toothed sector SA, SB,

SC gearing with'toothed wheels each connected to the wheel of any standard type of totalizer.- Said wheels, which vary in number according to the size of the machine, are designated by RA, RB, RC, RD On these wheels are mounted all the known devices such for example asthe tens transferring device, the automatic device for resetting to zero and the like. These devices have not been illustrated since'they form no part of the present invention. The electromagnets of a set TA are so arranged with respect to the corresponding lever LA that, accord-' ing to the position ofthe electromagnet energized, the amplitude of the movement which said lever is caused to perform, varies, as, con sequently, does likewise the amplitude of the movement ofSthe totalizing wheel RA. In

otherwords, when for ex mple it is the wire A of the group A of vertical wires through normal position the wheel RA. will not be rotated. Thus the; totalizing Wheels RA, RB are only rotated for one direction which current flows whereby the electromagnet ta of the setTA is excited, the totalizing wheel RA registers or displays the Figure 3. Naturally, each sector SA acts on the corresponding wheelin one direction only so that when the lever LA rises again, it shall not;

rotate.

To this end, the lever LA has a forked end 100 adapted to engage a stud 101 projecting from a block 102 in which two racks 103 and 104 are formed. The block 102 can be shifted to the left or right by .a link 105 whereby the rack 103 or 104, as the case may be, is brought into engagement with a pinion 106 concentrically with which is mounted a toothed Wheel 107 to rotate therewith. The various totalizing wheels RA, RB are mounted on a common spindle 108 which carries a lever 109 pivotally mounted at 110. Saidlever has two crank arms on which act respectively a spring 111 and a solenoid 112. The solenoid 112 is adapted to be energized when either of the circuits m or M is closed. When the solenoid 112 is energized,'-the lever109 is swung downward so that the wheel RA is brought into gear with the wheel 107. Since at the same time the lever LA has been caused to pivot, it will carry with it the block 102,

' and if the latter has been previously shifted by the link 105 to bring one or other of its racks 103or 104 into mesh with the pinion 1.06, the latter and consequently-the wheel 107 will be rotated thereby rotating the wheel RA As soon as the circuit m or M, as the case may be, is broken, the solenoid 112 will be deenergized and the totalizing wheels RA, RB will move out of engagement with the wheel 107 under the action of the spring 111 so that as the lever LA returns to its of swing of. the levers LA, LB. The ob ject in rovi'ding two racks 103 and 104 is to enable both multiplication and division to be performed.

. Returning now to the'construction of the electrical board, it will be seen from Fig. 1 that it includes a third set of horizontal circuits formed by III, IV corresponding to the'first nine digits and each including a certain number of Wires I1: I27 0 11 ,112,114 b Each wire of each'of-said horizontal groups is connected to'one of. the multiplier wires M m Mg and may be connected,'in each of the vertical groups A, B which it intersects, to that wire of the group which cor responds to the figure forming the product of the corresponding multiplier figure and the figure to which the horizontal group in question corresponds: Thus, for example, in the horizontal grou'p'II, the wireIL, (cor-'- responding to the multiplicand 2) which'is tersection squares.

nine groups of circuits I, II,.

the number of wires varying according to the groups. 7

4 being the product obtained from the multiplication 2 x 2. The conditions determining the connections of the horizontal wires to the multiplier circuits and to the vertical circuits may be easily followed in Fig. 1, especially as the same indices have been given. to the horizontal wires I,,.I Ill, II as to the vertical wires A A B B which they are connected, said indices representing moreover the product figure l 2 to which said vertical wires correspond respectively. When the product is formed by a single digit, as obtains in the case considered above, only the principal multiplier circuits M M M come into action. On the contrary, when the product of two-figures is a .two digit number, the. auxiliary circuit m and the main circuit M of the multiplier come into action in succession, the former giving the tens product digit and the latter the units digit. With this aim in view, the auxiliary circuits are suitably connected to the horizontal wires of the several groups I, II, III, IV, V and soon which already serve to obtain the product of the units.

It will be seen for example that the auxiliary-circuit m of the multiplier 5 is connected to the horizontal wire V11 which is con nected-to the vertical-wires A B C the tens" digit of the product of 5 x 7 being 3; similarly, the main circuit M correspondsection of the wires forms so to speak a checker board comprising n vertical row of n in- In each of said intersec tion squares, it must be possible for the horizontal wires I I I to be suitably connected to the corresponding vertical wires A A A A device which may be used to advantage fori obtaining such' electrical connection hasbeen illustrated in Figs. (Sand As may be seen in these figures, groups of vertical wires such as A, B, C are mounted on the lower faceof a panel 7" made of vulcanite or the like and which is common to all the groups, whereas the groups of horizontal wires, such as 1V IV are 'mounted on the upper face of another vul-' the- 120 canite panel 7. *In each of the intersection squares, theeponite panel's include suitably disposed holes which accommodate metallic sockets mounted on springs. such as 8 and 9 and to which the vertical-or'horizontal wires are electrically connected. In therintersection squares which determine the horizontal group 4 (which has been illustrated in plan byway of example in Fig. 7), the sockets such as 8 and 9 are located in the following. manner. The socket 8 connectedfor example to tlie vertical wire A is located opposite thesocket 9 connected to the wire 1V Similarly, the socket 8 connected to the wire A is located opposite the socket 9 connected to the wire 1V2 and soon.

If, therefore, the sockets 8 and 9 of an intersection square are electrically connected by means of any device, all the wires of the horizontal group and of the yertical group concerned will be connected together in the manner desired. The device enabling all the sockets 8 and 9 to be simultaneously connected together is constituted, in the case illustrated, by a key including any standard type of knob 10, on the stem 11 of which is mounted a plate 12 including as many contact studs such as 13, as there are pairs of sockets 8 and 9 in the corresponding intersection square. A spring 14 holds the plate 12 in the position in which the contact studs 13 do not connect together electrically the pairs of sockets 8 and 9. Under these circumstances, the vertic al and horizontal wires are normally not connected together. On the other hand, when the knob 10 isdepressed, the contact studs 13 which are still engaged in the sockets 9 will engage in the corresponding sockets 8 and establish the electrical connection desired. A conventional type of locking device comprehensively designated by 15 maintains the plate 12 in its depressed position. Any suitable device such as a cam shaft 16, enables the plate to be released and automatically raised to its position of rest.

By thus locating a plate 12' opposite each of the intersection squares, a nest of knobs 10 is obtained comprising a vertical rows of nine knobs 10. Thus to a certain extent a multiplicand keyboard is obtained similar to the keyboard of ordinary calculating machines. In the keyboard, each vertical row of nine keys includes a key for each digit, and

.each of said rows corresponds to a denominational order of the multiplicand.

For greater simplicity, a black circle has merely been featured in Fig, 1 at the intersection of the horizontal and vertical wires which are to be connected together, in order to illustrate how the horizontal and vertical wires can be connected together in each intersection square.

Before passing onto the general mode of operation of the apparatus, a description will be given of the device which enables the tens digit and the units digit of the product of two numbers to be suitably registered. Said device is formed by mounting the sets of electromagnets TA, TB, TO on a slide-rest 17 which can shift relative to the totalizing wheels BA, BB, RC The movement of the slide-rest 17 (Fig. 3) which can be shifted to the right by a spring or the like, is regulated by an anchor escapement mechanism of any known type comprehensively designated by 18, and which, by co-operatmg with teeth 19 of the slide-rest 17 only allows the latter to shift by successive jerks of amplitude corresponding to the transverse distance between two sets of clectromagnets TA, TB, so that each displacement of the sliderest 17 brings each set of electromagnets opposite the totalizing wheel RA, RB immediatelv following that opposite which said set of electromagnets was previously positioned. The following device is provided for actuating the anchor escapement device 18, that is to say for displacing the slide-rest 17 at the desired instant. An electromagnet 20 is positioned opposite saidescapement and, when-energized, it can withdraw the same,

said electromagnet 20 being mounted in a.

circuit 21 which may be closed by one or other of the contacts such as 22. There is a contact 22 for each of the multiplier keys T T and each time one of said keys is depressed the corresponding contact 22 is actuated, that is to say, the circuit 21 is closed by withdrawal of the anchor escapement 18 whereby the slide-rest 17 is allowed to shift. An examinationof Fig. 2 will show that the contact 22 is actuated after the contact m corresponding tothe auxiliar multiplier circuit, but before the contact corresponding to the main multiplier circuit.

As is usual in connection with computing machines, the slide-rest 17 may also be displaced by depressing a key T independent of the multiplier keys T T T and which causes a contact 22 shunted across the contact 22 to close the circuit 21 whereby the latter can be controlled independently of the switches m, 22, M, and the electromagnet 2O energized to actuate the escapement 18. Thus when there is a zero in the multiplier it is allowed for by depressing the key T 'to shift the slide-rest 17. When the key T is released a spring 2* returns it into the posi 'on in which the contact 22 is inoperative.

In describing the operation of the above machine, it willbe assumed that it is required to multiply 452 by 34, the slide-rest 17 being in its extreme left position, the set of electromagnets TA corresponding under these circumstances to the totalizer wheel RA. The

.first step is to register the multiplicand 452.

To this effect, the key 4 of the row A is depressed as are also the key 5 of the row B and the'key 2 of the row C. The keys thus depressed remain in theposition in which the contact studs 13 connect. together electrically the horizontal and vertical wires of the groups concerned in the desired manner. The key T corresponding to the first multiplier digit 3 is then depressed. The result is to close first of all the auxiliary circuit m which is connected more particularly to the wire IV of the horizontal group 4 and to the wire V of the group 5 whereas it is not connected toany wire of the group 2. The totalizing Wheel RA will consequently register the digit I as also will the totalizing wheel .RB. The next consequence of degroup II; hence the result of closing the circuit M will be to cause the digits 2, 5 and 6 to be registered respectively by the wheels RB, RC and RD. The registrations of the totalizing wheels may moreover be tabulated as follows:

Totalizing wheels:

RA RB. RC RD RE 2 The key T then returns to its normal pocomplete revolution each time the key is depressed and will not go back.

The key T corresponding to the second multiplier digit 4 is then depressed thereby first of all closing thecircuit m which is connected to the wire 1V of the group IV land to the wire V 'of the group 5 whilst it is not connected to any wire of the group IL. Hence the totalizing wheel RB will again register the digit 1 and the totalizing wheel BC the digit 2. With the circuit 21 then closing, a

fresh displacement of the slide-rest 17 will occur, the set of electromagnets TA in particular taking up a position opposite the' ,totalizing wheel RC whilst the other sets of electromagnets are'shifted in a correspond ing manner. Finally the result of depressing the key T will be to close the circuit M4 which is connected to the wire IV. of the group IV to the wire II, of the gr'oupII whereas it is not connected to any wire of the group V. The totalizing wheel RC which now corresponds to'the vertical group A will therefore register the figure 6, the totalizing wheel RD will not register any digit, whilst the totalizing wheel RE corresponding to the vertical group C will register the figure 8.

C6 The complete result of the registrations of Since the totalizing wheels themselves transfer the tens through the medium of the device they include and which has not been illustrated, since it forms no part of the present invention, the totalizer Wlll give the product of the multiplication which in the case in point is loiifiti. C Q

In order to start a new operation, the displaced slide rest and magnets are returned oy hand against the action of the spring just asi'n an ordinary typewriter.

At the beginning of the description it was stated that it was only with a view to simplicity and to make the explanations clearer that the assumption was made that for each multiplier key T T T j there was only a single main circuit M M M and a pens to be connected simultaneously to a wire ofseveral horizontal groups. Thus the circuit M of the key T is connected (Fig. 1) to the wire I of the group I, to the wire I]; of the group II, to the wire III of the group III and so on. Similarly, certain of the horizontal wires are connected simultaneously td several multiplier circuits. Thus for example the wire L, of the group VI is connected both to the multiplier circuit M, of the key T and to the circuit M of the key T Under these circumstances, when the circuit M, is closed, shunt currents might flow inthe 'circuit M which would be a cause of error. This drawback is obviated by replacing in each key T T T each circuit M m,, M, by a group of circuits each connecting to a single. horizontal wire. The'circuitm of the key T for example'is composed, as

shown in Fig. 8, of six wires connected respectively to the horizontal wires, 1V V V1 V11 VIII 1X Similarly, the circuit M of the same key T comprises nine circuits respectively connected to the horizontal WIIGS Ia II III, 1V2, V5 V15, VII] VIII,

1X Of course the contacts m and M are designed to close simultaneously all the mul-. tiplier circuits of a group.

If a horizontal, group be considered, the group V1 for example, as shown in Fig. 9, it will be 'nected in certain bases to several multiplier circuits but none of said multiplier cirseen that each wireis concuits is connected to another horizontal wire.

Shunt currents are thus completely avoided.

The wire VI for example is connected simultaneously to the contacts M of the key T m of T,, m ofT and M of T,; as no mulcould be substituted therefor. Thus, for ex-- ample, in Fig. 10 there has been illustrated a modified form of construction of the device illustrated in Fig. 4 for actuating the totalizing wheels BA, BB

The lever LApivots about an axis 30 and its pivot movement is brought about at the suitable moment'by a comparatively power- ,ful electromagnet 31. ,The amplitude of the [pivot movement is limited, according to the re which has to be registered by the totalizing wheel RA, by the electromagnet of the group ta. ta ta which corresponds to said figure. A

To this efiect, eachof said electromagnets, when energized, causes a stop 32 to project into the part of the nose 33 of the lever LA upon pivoting of the latter. As in the previous case, the desired figure is registered by the totalizing wheel, and it is only necessary that the corresponding 'electromagnet tn ta m be energized. Similarly, the electric board has been described on the as-- sumption that multiplications are to made, but it will be obvious that said board may be used without any changes for additions, subtractions and divisions.

' In the case of additions, for example, no changes need even be made in the mechanical devices for driving the totalizers. Addition is accomplished simpl b depressin the key T so that thecircuit Mi si iall always e closed and by registering in succession all the numbersto be summated on the keyboard of the 'multiplicand; the result of said summations will be immediately recorded by the totalizing wheels.

As for divisions and subtractions, the only changes required are concerned with the construction of the mechanical devices for driving the totalizing wheels, the electric board which constitutes the essential characteristic of the present invention remaining un-- changed.

A will be observed finally that constructional details such as the automatic device for raising the keysof the multiplicand, the. device-for transferring the tens in the totalizer have not been described, for said devicesmay be of any type well known in the art of calculating machines.

It is moreover self evident that the inven' tion has only been described and illustrated here in a purely explanatory but by no means limitative manner, and that it could be sub- 1. In an electrical calculating machine, the

combination of a first set of nine groups of circuits corresponding to the nine digits, a second set of nine groups of circuits, each group of said first set of circuits being connected to each group of said second set of circuits, a third set of circuits comprising n groups of nine wires each, selective means for connecting a wire of a group of said second set of circuits to the wire of every group of said third set of circuits whose digit value in its group is e ual to aidigit in the product obtained by mu tiplying'the digit value of the group ofsaid second circuit wire by the di it value of the wire of said first set of circuits to which said second circuit wire is connected, selective means for closing one of said first set of circuits, and means energized by ,the Wires of said third set of circuits for effecting registration of the results obtained by selective closing of one of said fii'st set of circuits and selective connection of wires of said second to wires of said third set of circuits. 2. In an electrical calculating machine, the combinationof a first set of nine groups of circuits corresponding to the nine digits, a second set of nine groups of circuits, each group of said first set of circuits being connected to each group of said second set of circuits, a third set of circuits comprisin n groups of nine wires each, selective means %or I connecting a wire of a group of said second set'of circuits to the wire of every group of said third set of circuits whose digit value in its group is equal to a digit in the product obtained by multiplying the digit value of the group of said second circuit wire by the digit value of the wire of said first set of circuits to which said second circuit wire is connected, selective means for closing one of said first set of circuits, n groups of nine electromagnets respectivelyconnected to the n groups of nine wires of said third set of circuits, totalizing mechanism, and means controlled by said respective electromagnets when energized for rotating said totalizing mechanism through different angles to register the results obtained from selective closing of one ofsaid first set of circuits and selective connection of wires of said second and third set of circuits. 3. In an electrical calculating machine, the combination of a first set of nine groups of circuits corresponding to the nine digits, each of said groups save the first being divided into 7 a units and a tens section, a second set of nine groups of circuits connected to said units and tens sections of said first set of circuits according to the digits of partial products, a

third set of circuits comprising n groups of nine wireseach, selective means for connecting a w1re of each group of said second set of circuits to the wire of every group of said 'of circuits, and means energized by the wires of said third set of circuits for effecting registration of the results obtained by selective closing of a section of a group of said first set of circuits and selective connection of wires of said second to wires of said third set of circuits. p

4 I11 an electrical calculating machine, the combination of a first set of nine groups of circuits corresponding to the nine digits each of'said groups save the first being divided into a unitsan'd a tens section, a second set of nine groups of circuits connected to said units and tens sections of said first set of circuitsaccording to the digits of partial products, a third setof circuits comprising a groups of nine wires each, selective means for connecting a wire of each group of vsaid second set of circuits to the wire of every group of said third set of circuits whose digit value in its group is equal to one of the digits in the product obtained by multiplying the digit value of the group of said second circuit wire by the digit value of the grou of the wire of said first set of circuits to which said second circuit wire is connected, said digit being the units or tens digit according to whether said second circuit wire is connected to a units or tens wire of said first group of circuits, selective means for closing in succession the tens and units sections of a group of said first set of circuits,

and means energized by the wires of said third set of circuits for effecting registration of the results obtained by selective closing of a group of said first set of circuits and selective connection of wires of said second to wires of said third set of circuits.

, 5. In an electrical calculating machine, the

combination of a first set of nine groups'of circuits corresponding to the nine dlgits, each of said groups save the first being di: vided into a unitsahd a tens section a. second set of ninegroups of circuits, each units and tens section of said first set of circuits being connected to thewire of each group of said second set of circuits whose digit value n its group-is equal to the corres 'onding units or tens digit of thefproduct of t e digit values of the groups of the second circuit wire and the first circuit sectionv in question, a

third set of circuits comprising a groups of nine wires each, selective means 'for connecting together the'wifes of said second and third sets of. circuits whose digit value in their respective groups are the same selective means for closing in succession the tens and units sections of a group of said first set' of circuits, 1 groups of nine electromagnets respectively connected to the n groups of nine wires of said third set of circuits, a plurality of totalizing wheels, plurality of means controlled respectively by said electromagnets for rotating'a correspondingtotalizing wheel through different angles depending on the electromagnet of the group energized, an electrical circuit closedby said selective means betweenclosure of the tens and units sections of a group of said first set of circuits, and means energized by said circuit for displacing said groups of elcctromagnets rela tive to said totalizing wheel controlling means whereby the units and tens digits of the products obtained from said third set of circuits are registered on different wheels.

- 6. In an electrical calculating machine, the combination of a first set of nine groups of circuits corresponding to the nine digits, each of said groups save the first being divided 'into a units and a tens wire, a second set of nine groups of circuits, each units and tens section of said first set of circuits being con nected to the wire of each group of said second set of circuits whose digit value in its group is equal to the corresponding units or tens digit of the product of the digit values of the groups of the second circuit wire and the first circuit section in question, a third set of circuits comprising n groups of nine wires each, selective means for connecting together the wires of said second and third sets of circuits whose digit values in their respective groups are the same, selector keys for closing in succession the tens and units sections of a group of first set of circuits, n groups of nine electromagnets respectively connected to the n groups of nine wires of said third set of circuits, a plurality of totalizing wheels, a plurality of means controlled respectively by said electromagnets for rotating :1. corresponding totalizin wheel through an angle depending on the e ectromagnet of the group selectively energized, a circuit adapted to be made by each selector key between the making of said tens and units sections of a group of said first set of circuits, a displaceable slide-rest adapted to carry said groups of electromagnets, and means including an escapement mechanism and an electromagnet ener ized by said circuitv for efiecting such disp acement of said slide-rest as will bring each group of. electromagnets into position fo actuatingthe totalizing wheel controlling means succeeding that previously actuated so that the units and tens digits will be registered on different wheels.

- 7; In an electrical calculating machine, the

combination ofafirst set of nine groups of cuits being connected to the wire of each group of said second set of circuits whose digit value in its group is equal to the corresponding units or tens digit of the product of the digit values of the groups of the second circuit wire and the first circuit section in question, a third set of circuits comprising n groups of nine wires each, the grou s of said second circuit wires being-arrange to cross 10 the groups of said third circuit wires without being normally connected thereto, a' contact key associated with each intersection square formed by two intersecting groups of said second and third set of circuits res ectively, means actuated by depressing said ey for simultaneously, connecting each wire of the corresponding second circuit group to the wire of the intersecting third circuit group whose digit value in-its group is the same as that of the second circuit wire in question, selective means for closing in succession the tens and units sections of a group of said first set of circuits, n groups of nine electromagnets respectively connected to the n groups of nine wires of said third set of circuits, a plurality of totalizing wheels, means controlled by said respective electromagnets for rotating a correspondin totalizing wheel through different angles epend- 3o ing on the electromagnets of the group energized, an electrical circuit closed by said selective means between closure of the tens and units sections of a group of said first set of circuits, and means energized by said cir- V 'cuit for displacing said groups of electroma nets relative to said totalizing wheel contro ling means whereby the units and tens digits of the products obtained from said third set of circuits are registered on different wheels.

40 RENE EDMOND BOUTEII. 

